1399394 has 4 divisors (see below), whose sum is σ = 2099094. Its totient is φ = 699696.

The previous prime is 1399393. The next prime is 1399399. The reversal of 1399394 is 4939931.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 4939931 = 251 ⋅19681.

It can be written as a sum of positive squares in only one way, i.e., 1380625 + 18769 = 1175^2 + 137^2 .

It is not an unprimeable number, because it can be changed into a prime (1399393) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 349847 + ... + 349850.

2^1399394 is an apocalyptic number.

1399394 is a deficient number, since it is larger than the sum of its proper divisors (699700).

1399394 is an equidigital number, since it uses as much as digits as its factorization.

1399394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 699699.

The product of its digits is 26244, while the sum is 38.

The square root of 1399394 is about 1182.9598471630. The cubic root of 1399394 is about 111.8527507953.

The spelling of 1399394 in words is "one million, three hundred ninety-nine thousand, three hundred ninety-four".